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213results about How to "simple ingredients" patented technology

Ammonium polyphosphate, montmorillonite nano complex and preparation thereof

The invention relates to an ammonium polyphosphate and montmorillonite nano compound and a preparation method thereof, which belong to the phosphorous compound preparation, composition, modification and crystalline control field. The method for preparing the nano compound comprises the following steps: montmorillonite is added during the preliminary stage of the process of general preparation of ammonium polyphosphate; ammonia is passed through when the temperature is raised to between 150 and 300 DEG C; heat preservation is performed when the temperature is raised to between 300 and 350 DEG C; and then the ammonium polyphosphate and montmorillonite nano compound are obtained after continuous ammoniation for 30 to 200 minutes. The preparation method controls the purity of an I-type polyphosphoric acid in the product through addition of a specific amount of the montmorillonite; the ammonium polyphosphate completely off a silicate slice of the montmorillonite; and nano-dispersion is formed in the ammonium polyphosphate, and then the ammonium polyphosphate and montmorillonite nano compound is obtained. The nano compound reduces the water solubility of the ammonium polyphosphate, has the function of improving the flame-retardant effect in inflaming retarding of polymer materials, and has the advantages of simple preparation technology and raw materials and low cost.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Automatic screw rod feeding device

ActiveCN103523515ASimple ingredientsAccurate and reliable distribution
The invention provides an automatic screw rod feeding device which comprises a machine frame with a worktable, a quick-replaced material box, a feeding part and a material pushing part. The quick-replaced material box is arranged on the worktable of the machine frame and used for carrying screw rods to be conveyed; the feeding part is disposed on the worktable of the machine frame, is in butt joint with the quick-replaced material body and comprises a temporary material storing area and a sliding table of a sliding area, a first blocking element is arranged between the temporary material storing area and the sliding area in a convex mode, a material pushing through groove is formed in the tail end of the temporary material storing area and located in the first blocking element position, a discharging opening is formed in the tail end of the sliding area, and a second blocking element is disposed on the discharging opening; the material pushing part comprises a first-stage wedge angle push plate and a second-stage wedge angle push plate, the two push plates can be driven by a drive mechanism to move vertically, the first-stage wedge angle push plate is vertically arranged on the butt joint portion of the material box and the sliding table, and the second-stage wedge angle push plate is vertically inserted into the material pushing through groove. The automatic screw rod feeding device overcomes the defects that in the prior art, directional feeding of screw rods with special head characteristics is difficult, conveying efficiency is low, and the successful rate of directional feeding is low.
Owner:SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI

Process for preparing compact magnesium oxide/hydroxyapatite nano fiber double-layer coating on surface of magnesium base

The invention discloses a process for preparing compact magnesium oxide/hydroxyapatite nano fiber double-layer coating on the surface of a magnesium base. The process includes firstly preparing porous magnesium oxide coating containing phosphorus and calcium on the surface of magnesium or magnesium alloy by the microarc oxidation technique, namely utilizing phosphorus and calcium containing water solution as electrolyte, subjecting the magnesium or magnesium alloy to microarc oxidation treatment under high voltage by means of a direct-current pulse power source, and then subjecting the porous magnesium oxide coating containing phosphorus and calcium to hydro-thermal treatment in the specific hydro-thermal environment to obtain the magnesium oxide/hydroxyapatite nano fiber double-layer coating. The magnesium oxide/hydroxyapatite nano fiber double-layer coating obtained has the structure of an inner layer (adjacent to a basal body) composed of magnesium oxide and a small amount of magnesium hydrate and being compact and a surface layer formed by nano fiber hydroxyapatite layer, and has the advantages of high bonding strength, fine biological activity and capability of improving corrosion resistance of the magnesium and magnesium alloy in body fluid evidently. Besides, no discontinuous surfaces exist between the double-layer coating and the basal body.
Owner:XI AN JIAOTONG UNIV

Elastomer modified asphalt waterproof coiled material as well as production technology and equipment thereof

The invention discloses an elastomer modified asphalt waterproof coiled material as well as a production technology and equipment thereof. The coiled material is prepared by the following raw materials in parts by weight: 20 parts of 10# asphalt, 40 parts of 100# asphalt, 11 parts of machine oil, 12 parts of elastomer and 17 parts of talcum powder. The technology comprises the steps of ingredient stirring, base feeding, oil dip coating, sanding, film coating, traction compaction and the like. The equipment comprises a metering tank, a batching tank, a colloid mill and an oil coating groove, wherein the oil coating groove is provided with an oil coating roll; a base unfolding device, a base overlapping machine, a base retention machine and a base dryer are sequentially arranged at an inlet end of the oil coating roll; and an oil soaking groove and a film coating device are sequentially arranged at an outlet end of the oil coating roll and connected with the oil coating roll. The coiled material has the advantages that the coiled material has simple components, is higher in property, simple and practicable in technology and easy to control; the surface of the coiled material is level and free from holes, chipped edges, gaps and pimples; mineral particles are uniform and consistent in particle size and are adhered to the surface of the coiled material tightly; and the coiled material is wide in using temperature range and aging-resistant.
Owner:潍坊英凯防水材料有限公司

Preparation method of tungsten/copper layer composite material based on surface nanocrystallization of tungsten sheet

A preparation method of a tungsten/copper layer composite material based on surface nanocrystallization of a tungsten sheet is disclosed. The method includes performing surface pretreatment on the tungsten sheet; performing two steps of anodic oxidation and hydrogen reduction annealing in order to obtain a tungsten sheet having a deeply deoxygenated surface nanometer porous structure; electroplating the surface of the tungsten sheet having the nanometer porous structure with copper; and finally subjecting a tungsten/copper electroplated sample to high-temperature diffusion annealing to obtainthe tungsten/copper layer composite material. During preparation, the nanometer porous structure on the surface of the tungsten sheet can increase the contact area and improve surface activity, and can play a role of mechanically meshing a copper layer. A thermal shock method and a cross cut method are adopted to detect whether the copper metal layer shows peeling and shedding phenomena or not. The preparation method has characteristics of a simple process, a stable and pollution-free electroplating solution, a high connection efficiency, a low production cost, and good repeatability, can prepare a tungsten/copper material having a complex shape and based on the inner surface of a workpiece, avoid influences of metal middle layers on material performance, and facilitate industrial application of the tungsten/copper composite material.
Owner:TIANJIN UNIV

Circuit board resin film evener and using method thereof

InactiveCN102170756Asimple ingredientslow cost
The invention discloses a circuit board resin film evener machine and a using method thereof. The circuit board resin film evener machine comprises a film feeding mechanism, a film receiving mechanism, a compressing mechanism, a guide material mechanism, a transmission mechanism and a rack. In the invention, redundant resin on a circuit board is stuck and removed by a pressed film, the raw material is simple, and the cost is low. The circuit board resin film evener has a simple structure; a fastener fixed bracket is designed, so that the assembly and the disassembly of the new pressed film and old pressed film are convenient, and the production efficiency can be improved; by the design of a pressure tight end and an elastic fixed bracket, the pressed film can keep level and compact all the time to be completed fit with the circuit board, and the redundant resin on the circuit board can be effectively stuck and removed; the transmission mechanism with a plurality of gears is driven by a motor, so that rollers for compressing can keep the same linear speed, so that the pressed film can keep level and compact all the time; as the electric heating filaments in the compressing rollers and the coder in the compressing gears are arranged, the compressing temperature can be controlled, the resin in a through hole can be in a half-curing state all the time, simultaneously; and the rotating speed of the motor can be adjusted along the changes of the diameter of a film feeding roller, so that the pressed film can be fitted and separated at constant speed.
Owner:衢州威盛精密电子科技有限公司

Novel method for synthesizing chiral 4-nitryl-3, 5-diaryl cyclohexanone

The invention belongs to the field of asymmetric synthesis, and particularly relates to a novel method for catalyzing and synthesizing a chiral 4-nitryl-3, 5-diaryl cyclohexanone compound by chiral thiocarbamide as a catalyst. The method comprises the following steps of: (1) reacting by taking diketene and nitromethane as a reaction substrate, quinine-derived thiocarbamide as a chiral catalyst and methylbenzene as solvent at the temperature of between 20 and 25 DEG C for 24 to 72 hours to generate a Michael addition product; and (2) reacting by taking the Michael addition product obtained in the step (1) as a reactant, potassium hydroxide as a catalyst and ethanol as solvent at the temperature of between 0 and 10 DEG C for 0.5 to 2 hours to obtain a chiral 4-nitryl-3, 5-diaryl cyclohexanone derivative. The novel method for synthesizing the chiral 4-nitryl-3, 5-diaryl cyclohexanone compound has the advantages of readily available materials and mild reaction conditions and is easy and convenient to operate, and a reaction system is insensitive to air, aqueous vapor and the like and aftertreatment is convenient, so the chiral 4-nitryl-3, 5-diaryl cyclohexanone compound is suitable for industrial production. Simultaneously, the synthetic method has the characteristics of high yield and excellent diastereoselectivity and enantioselectivity.
Owner:SUZHOU UNIV

Method for preparing nitrogen-doped fluorinated graphene by using graphite fluoride

The invention relates to a method for preparing nitrogen-doped fluorinated graphene by using graphite fluoride, comprising the following steps: raw materials are weighed in proportion and are added into an agate pot, agate beads are added to help grinding, and uniform stirring is performed; the mixture is placed in a ball mill to be subjected to ball milling for 15 to 30 hours, wherein the ball milling frequency is 540 to 600 rpm; after ball milling is ended, the nitrogen-doped fluorinated graphene containing a small amount of impurities is ultrasonically dispersed in deionized water to obtaina water system mixed suspension; the water system mixed suspension obtained after ultrasonication is placed in a centrifuge tube for centrifugation, a fluorinated graphene stabilized suspension in which the upper layer is doped with nitrogen element is collected, and precipitate is discarded; and the water in the fluorinated graphene stabilized suspension in which nitrogen element is doped is removed by suction filtration, and vacuum drying is performed to obtain the nitrogen-doped fluorinated graphene. The preparation process of is relatively simple, and easy to operate and control, which can realize large-scale production; the prepared nitrogen-doped fluorinated graphene has good quality and improved hydrophilicity.
Owner:SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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